html,
body {
  width: 100%;
  height: 100%;
}
* {
  margin: 0;
  padding: 0;
}
body {
  display: flex;
  flex-direction: column;
}
body #vid {
  width: 100%;
  height: 371px;
  background: #000;
}
body #vid .fanhui {
  width: 40px;
  height: 40px;
  font-size: 30px;
  text-align: center;
  line-height: 40px;
  font-weight: bold;
  color: #fff;
  margin: 10px 0 0 10px;
}
